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Old 10-08-2011, 06:55 PM   #1
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Basement Stairway Stringer


Hello,

I just bought a new home and one of the items in my home inspection state: Top of basement stairway stringer does not rest fully on band. Stairway stringer should be evaluated and shimmed or modified as needed for safety.

The inspector included a picture, as well, but I am having a hard time understanding exactly what he is talking about as the band.

Is it something on the side of the arrow, or is it the big open space where the nails are???

Thanks!!!
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Old 10-08-2011, 07:09 PM   #2
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Basement Stairway Stringer


The band is where the stringer meets, it's sort of like a header where the load of the stairs get transferred. That gap should be shimmer.

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Old 10-08-2011, 07:16 PM   #3
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Basement Stairway Stringer


Thank you so much for the response.

So you're saying the red area that I colored is the area that needs to be shimmed??
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Old 10-08-2011, 07:41 PM   #4
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Basement Stairway Stringer


Yes, all the way inside, so that the stringers rest on the header. I presume this picture is taken from underneath looking up?

Good job in using photo editor. :-)
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Old 10-08-2011, 08:18 PM   #5
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Basement Stairway Stringer


Thank you. I am much more handy with a computer than I am with a hammer, but I am going to learn.

Yes, the picture was taken from underneath. How would you suggest I fix it?? A 2x4??
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Old 10-08-2011, 08:41 PM   #6
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Basement Stairway Stringer


The shim needs to be the thickness of the gap. Usually we will cut a wedge piece and tap into place, and secure with some toe nails through the stringer and the wedge. If you can start with a small block of plywood, you can then install a standard shim until it is tight. You can buy bundles of shims at any box store for just a few bucks. That gap looks to big for shims only. A scrap of plywood would get it closer.
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Old 10-08-2011, 10:09 PM   #7
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Basement Stairway Stringer


If it is going to be inspected, you may want to use solid wood for structural framing, rather than plywood. Treated 2x4 if it fits the 1-1/2" or dado it to fit exactly, if on concrete. Add a strip of 6mil.plastic to stop any moisture wicking through the concrete into and through the pressure treated wood; http://www.greenbuildingadvisor.com/...-building-code Once an inspector wouldn't pass the cedar shims because they weren't structural..... and he was right- but solid wood is.

I would add another 2x under the new 2x6 to give some solid support to the center stringer, if the side ones are nailed to the studs (good practice). Rip a bevel on it to match the stringer angle.

Good inspector--- the strength is in the bottom 3" of the stringer- similar to a rafter resting on its heel rather than toe: scroll just a bit: http://books.google.com/books?id=iwS...rafter&f=false

You can buy composite shims also.

Gary

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